pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8215-942_Hey_ding_a_ding.ps) >>/Users/jc/w/tmp/Tune-8215-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1780/Thompson/942_Hey_ding_a_ding.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_82151.log 43024 Log file, useful mostly for debugging
Coll_82153.log 292760 Log file, useful mostly for debugging
Coll_82155.log 282925 Log file, useful mostly for debugging
Coll_82157.log 288545 Log file, useful mostly for debugging
Tune-8215-942_Hey_ding_a_ding.abc 915 ABC music file with the extracted tune(s)
Tune-8215-942_Hey_ding_a_ding.ps 34116 PostScript
Tune-8215-942_Hey_ding_a_ding.txt 915 Plain-text file with the extracted tune(s)
Tune-8215-get.log 10060 Log file, useful mostly for debugging
Tune-82151-get.log 4577 Log file, useful mostly for debugging
Tune-82152-get.log 4312 Log file, useful mostly for debugging
These files should be available for 24 hours.